KR100266859B1 - A method of remote call function implementation using base station test unit and test mobile - Google Patents

Abstract

PURPOSE: A method for remotely controlling calls using a BTU(Base station transceiver Test Unit) and a TM(Test Mobile), is provided to connect signal delivered through a base station antenna with the TM of the BTU, and to strengthen signals of a specific sector to decide a synchronizing sector. And the method is provided to enable a BTS(Base station Transceiver Subsystem) to transmit a message of forcibly changing a frequency, or to forcibly change a telephone number of the TM, so that the TM remotely sets up calls by being synchronized with a specific frequency. CONSTITUTION: A BTS located in a remote place receives a remote call test request command from a tester. If the occupation of resources is necessary for the BTS, resources are allocated. The BTS delivers a command to set up calls through a specific sector for testing a service state to a BTU. The BTU connects signals of the designated specific sector to a TM using an RSWU(Radio Frequency Switch Unit). The TM is synchronized with the designated sector. The BTS instructs the TM to by synchronized with a specific frequency/access channel through the designated sector. The TM requests originating calls to the BTS through the instructed specific frequency/access channel of the designated sector. If the BTS receives an originating request by remote calls from the TM, resources are allocated appropriately for the request. The BTS sets up calls with an incoming party by being interlinked with a system, to test a service state of the frequency/access channel of the designated sector.

Description

Remote call control method using base station tester and test terminal {A METHOD OF REMOTE CALL FUNCTION IMPLEMENTATION USING BASE STATION TEST UNIT AND TEST MOBILE}

The present invention provides a remote control using a base station transceiver (BTU) and a test mobile (TM) of a code division multiple access (CDMA) system and a personal communications services system. The present invention relates to a call control method, and in particular, to provide a method for remotely setting up a call using a base station tester and determining a service state of a specific resource of the base station.

Personal Communications Services (PCS) and CDMA cellular networks using CDMA technology each serve one cell (1, 2) and provide a mobile communication service to a mobile station (MS) 10 in the cell. A plurality of base stations (hereinafter referred to as BTSs) 20 and 30 for providing a base station controller and a base station controller (hereinafter referred to as BSCs) to control the plurality of base stations 20 and 30 are provided. 40 and a Mobile Switching Center (MSC) for connecting the base station controller to other subscriber systems.

A cell is a minimum unit of a service area in a cellular mobile communication system, and may be divided into several sectors.

In the mobile communication network configured as described above, the base station tester (BTU) is a base station test equipment used in a base station, and the base station system is in operation in a state where the normal operation of the base station system without additional measurement equipment or without additional measurement equipment. It is a device that can diagnose and monitor test at irregular intervals.

The base station tester is connected to the base station's transmit / receive antenna through a directional coupler (DC) to detect the antenna's transmit / receive standing wave ratio (VSWR). Performs a TPTL (Transceiver Power Tracking Loop), test mobile data display, remote control of the base station controller, channel quality check and call check.

The base station tester is composed of a base station tester power supply unit (BPSU), a power detector & test mobile unit (PTMU), and a radio frequency interface unit (RFIU). .

The high frequency interface unit includes an RF switch unit (RSWU), a power divider / combiner, a variable attenuator unit (ATTU), and the like.

The power detection and test terminal unit is composed of a base station tester control and interface unit (BCIA), a test terminal (TM), and a transmit power detector board (TPDB).

The high frequency switch is composed of a three way power combiner for distributing power to three switches corresponding to each sector.

Since each switch is connected to six transmit / receive antennas and three transmit-only antennas through a directional coupler, the high frequency switch includes a total of nine switches for three sectors and three antennas.

The three switches are connected through the forward and reflect terminals of the external sector antenna and the directional coupler, respectively, and select the forward / reflective / non-operation mode among the antenna paths. Path switch.

The forward path refers to a path where the transceiver of the base station and the base station tester are directly connected, and the reflection path refers to a path between the transceiver and the base station tester through the antenna.

The variable attenuator is for adjusting the strength of the transmit / receive signal transmitted from each sector in the transmit / receive path.

In order to determine the service state of the base station using the base station tester configured as described above, the service state of the base station is determined by going directly to the base station using a vehicle and making a call using the base station tester. In addition, additional equipment is required to identify a common air interface (CAI).

However, since the conventional equipment used to identify the air interface can identify only the air interface between the base station and the terminal, the call is made through a randomly allocated resource (frequency allocation, channel element, vocoder, etc.) for inspection by the base station. Setup is not possible.

That is, in the case of a CDMA system, a base station providing a common air interface (CAI) to a mobile terminal station is located far from a base station manager (BSM) that manages the base station. Therefore, in order to grasp the quality of service of a base station located at a remote site, when a complaint was received from a user, the user had to go directly to the place where the base station was located and set up a call and analyze the abnormality on the air interface by using the air interface analysis tool.

In addition, the CDMA mobile terminal is tuned to the strongest of the plurality of signals received from the surrounding base stations and sectors. That is, when the general mobile terminal is in a specific sector of a specific base station, the signal of the base station / sector in which the mobile terminal is located is stronger than the size of other base stations / sectors, so the mobile terminal tunes to the signal of the base station / sector.

In addition, when selecting a frequency to be tuned, the mobile station tunes to the frequency indicated by the base station according to its mobile identification number (MIN) and the resources of the base station. Thus, since the mobile terminal only has one phone number, the sector / frequency to be tuned at a particular location is determined and cannot be changed.

Therefore, in analyzing the radio service state of a base station, in order to grasp the service state of a frequency that cannot be allocated to the mobile station, the mobile station should be tested by changing the mobile phone number so that the mobile station tunes to the frequency to be tested. In today's environment where multiple frequencies are used, it is not easy to know the phone number of a mobile terminal that tunes to the frequency to be tested.

And even if the call is set up with the phone number of the mobile station that tunes to the frequency to be tested, the CDMA system can have multiple access channels in one frequency channel, so it is impossible to know which access channel the mobile terminal will use. Therefore, it becomes impossible to try to call by finding an access channel which is determined to be abnormal.

That is, the conventional air interface analysis tool can only analyze on the air interface, so that it is difficult to determine the cause of the call error in the entire system, and resources that are concerned that there is an abnormality among the resources held in the system, namely There is a problem in that it is not possible to remotely determine whether there is an abnormality on a specific frequency and a specific access channel, so it is necessary to go directly to the base station to set up a call, allocate resources, and perform a check.

The present invention is to solve the above problems, by connecting the signal transmitted to the air through the base station antenna to the test terminal of the base station tester through the wire and to increase the signal strength of the specific sector to be tested by the test terminal sector The base station transmits a message to the test terminal forcibly changing the frequency or forcibly changes the telephone number of the test terminal so that the test terminal is tuned to a specific frequency to establish a call remotely. The purpose of the remote call control method using a base station tester and a test terminal, which can test the service state of the.

1 is a structural diagram showing the connection between the base station tester and the antenna unit.

2 is a flowchart showing an embodiment of a remote call control method according to the present invention.

3 is a flow chart showing another embodiment of a remote call control method according to the present invention.

<Description of the code | symbol about the principal part of drawing>

100: power detection and test terminal unit (PTMU)

110: base station control and interface device (BCIA)

120: transmission power detection device (TPDB) 130: test terminal (TM)

210, 220, 230, 240: High Frequency Interface Unit (RFIU)

310, 320, 330: antenna unit

In order to achieve the above object, a first embodiment of the present invention provides a method for testing a service state of a base station specific resource using a base station tester and a test terminal included in a code division multiple access base station. Receiving, by the located base station, a remote call test request command from the tester; Allocating a resource when it is necessary to occupy the resource at the base station; Instructing the base station to set up a call over a particular sector for which service status is to be tested by the base station tester; Selecting, by a base station tester, a specific sector designated by the base station using a high frequency switch, and connecting a signal of the designated sector to the test terminal by wire; Tuning a test terminal to the designated sector; A base station instructing a test terminal through the designated sector to tune to the specific frequency / access channel; Requesting, by a test terminal, an originating signal to a base station via the indicated specific frequency / access channel of the designated sector; And when the base station receives the call request by the remote call from the test terminal, allocates resources according to the request and sets up a call with the called party in association with the system, thereby testing the service state of the frequency / access channel of the designated sector. A step is made.

A second embodiment of the present invention is a method for testing a service state of a base station specific resource using a base station tester and a test terminal included in a code division multiple access base station, wherein the base station located at a remote site is remotely connected from the tester to the remote call. Receiving a test request command; Allocating a resource when it is necessary to occupy the resource at the base station; Instructing the base station to set up a call over a particular sector for which service status is to be tested by the base station tester; Selecting, by a base station tester, a specific sector designated by the base station using a high frequency switch, and connecting a signal of the designated sector to the test terminal by wire; Tuning a test terminal to the designated sector; Obtaining a subscriber number (MIN) capable of catching a frequency for which service status is to be tested; A base station instructing a test terminal to change a terminal subscriber number (MIN) to the obtained subscriber number through the designated sector; Requesting, by a test terminal, an originating signal to a base station through a frequency / access channel corresponding to the changed subscriber number of the designated sector; And when the base station is requested to make a remote call from the test terminal, allocates resources according to the request and sets up a call with the called party in association with the system, thereby testing the service state of the frequency / access channel of the designated sector. It is made to include.

A third embodiment of the present invention is a method for testing a service state of a base station specific resource using a base station tester and a test terminal included in a code division multiple access base station. Receiving a test request command; Allocating a resource when it is necessary to occupy the resource at the base station; Instructing the base station to set up a call over a particular sector for which service status is to be tested by the base station tester; Selecting, by a base station tester, a specific sector designated by the base station using a high frequency switch, and connecting a signal of the designated sector to the test terminal by wire; Tuning a test terminal to the designated sector; Requesting an originating signal from a test terminal to a base station through the designated sector; And when the base station receives a call request by a remote call from a test terminal, allocates resources according to the request and sets up a call with the called party in association with the system, thereby testing the service state of the designated sector. .

The present invention uses a radio frequency switch unit (RSWU) mounted to a base station tester to connect a signal of a specific sector to a test terminal by wire, so that the test terminal is tuned to the specific sector and at the same time, the test terminal is connected at the base station. Force tuning to the specific frequency required.

In order to force the test terminal to tune to the specific frequency required by the base station, the present invention provides two methods.

The first method is a method in which a base station transmits a message for changing a frequency and an access channel through the air to a test terminal so that the test terminal is forcibly tuned to an access channel of a frequency to be tested.

In the second method, the test terminal obtains a value of a telephone number that can be tuned to a frequency to be tested using a hash algorithm, and then changes the telephone number of the test terminal to the value of the obtained telephone number. A method of tuning to an access channel of a frequency to be desired.

A CDMA cellular mobile terminal basically has its own telephone number, which is called a mobile station identification number (MIN). The mobile terminal also has a unique serial number assigned to it when it is produced at the factory, which is referred to as an electrical serial number (ESN).

Therefore, the CDMA mobile terminal determines its available frequency based on the subscriber number, the electronic serial number, and the channel number (frequency) of the base station, and attempts to access at this frequency. In addition, since the CDMA system includes several access channels in one frequency, the mobile terminal attempts to access an arbitrary access channel according to the parameter.

When attempting to test the base station receive access path, the mobile terminal always attempts to access at its assigned frequency.

Hereinafter, a method for causing the test terminal to be tuned to a specific sector will be described.

The structure in which the base station tester is connected to the base station antenna by a radio frequency switch unit (RSWU) is shown in FIG. 1.

FIG. 1 is a structural diagram illustrating a connection between a base station tester and an antenna unit, and as shown, a power detection and test terminal unit (PTMU) 100, and each sector to the power detection and test terminal unit (PTMU) 100. It consists of three Radio Frequency Interface Units (RFIUs) 210, 220, 230, 240 for connection and three antenna units 310, 320, 330 for each sector. .

The power detection and test terminal (PTMU) 100 includes a base station tester control and interface device (BCIA) 110, a transmission power detection device (TPDB) 120, and a test terminal (TM) 130. It is.

The base station tester control and interface device (BCIA) 110 controls one of three sectors by controlling the switch 10, the switch 11 and the variable attenuator 1 of the high frequency interface unit 240 by the control of the base station control processor (BCP). Select and control the size of the selected sector signal to connect to the test terminal 130. Then, the test terminal 140 is tuned to the sector signal received through the high frequency interface unit 240.

The three-path switch (switch 10) selects one of signals introduced from two-path power dividers # 1, 2, and 3 in three high frequency interface units 210, 220, and 230, and detects the transmission power. To the device (TPDB) 120. The transmit power detection device (TPDB) 120 measures the strength of the signal transmitted from the three-path switch and reports it to the base station tester control and interface device (BCIA) 110.

The high frequency interface unit 210, 220, 230 for each sector is one basic switch (switch 1 to switch 9) per antenna, and a three-path power combiner that bundles three antennas to provide one input / output path. # 1,2,3 and two-path power dividers # 1,2,3 with basic structure. In addition, the high frequency interface unit 240 includes two three-path switches (switch 10 and switch 11) and a variable attenuator 1 for selecting a path for each sector from the high frequency interface unit 210, 220 and 230.

The operation of the base station tester configured as described above is as follows.

The antenna units 310, 320, and 330 for three sectors (α, β, and γ sectors) each include two transmitting / receiving antennas and one antenna for transmission only.

The signal transmitted / received at each antenna is selected as a forward / reflected / inactive path by the three-path switches 1 to 9, and then the three-path power in the high frequency interface unit 210, 220, 230 is selected. Connected to coupler # 1, 2, 3.

The three-path power combiners # 1, 2, and 3 combine the signals of three antennas and transmit the signals to the two-path power dividers # 1, 2, and 3, and the two-path power dividers # 1, 2, and 3 are signals of each sector. To switch 10 and switch 11, respectively.

Switch 10 connects a signal of one of the three sectors to the transmission power detection device (TPDB) 120 so that the transmission power detection device (TPDB) 120 can measure the magnitude of the specified sector signal. The switch 11 connects a signal of one of the three sectors to the test terminal (TM) 130 so that the test terminal (TM) 130 can be tuned to the designated sector.

In addition, the frequency change method of the test terminal according to the present invention will be described. In the remote call setup, since the frequency change of the test terminal is performed after tuning to the above-mentioned sector, in this specification, two methods of frequency change according to the present invention are combined with a sector tuning method according to the present invention. Let's explain.

FIG. 2 is a flowchart showing a first embodiment of a remote call control method according to the present invention (first method of frequency change), with reference to FIGS. 1 and 2, using a base station tester and a test terminal according to the present invention. A first embodiment of the call control method will be described in detail.

When the base station in the remote control state of the base station tester receives a remote call test request command, the base station tester allocates resources and sends a command to set up a call to the base station tester when the resource is required to be occupied.

The base station tester uses the switch 11 of FIG. 1 to connect a signal of a specific sector to be tested, for example, a sector, indicated by the base station to the test terminal 130 through the variable attenuator 1, and through the a sector. Instruct the test terminal to tune to the particular frequency channel / access channel to be tested.

The test terminal requests an origination call from the base station through the frequency channel / access channel designated by the base station tester.

The base station determines the type of the originating signal to determine whether the terminal requesting the originating signal is a test terminal or a general mobile terminal. If the originating call requested from the test terminal is a remote call, assign the specified resource or any resource to meet the request of the originating call and set up the call with the called party in conjunction with the system.

If a call is released while the call is being set up or after the call is set up, the reason for the call being released is reported to the base station management device so that the operator can know the cause of the call failure.

In addition, after the call is normally set up, the base station management apparatus collects data by sending a dual tone multiple frequency (DTMF) tone, voice packet loop command, or data collection command to the base station. That is, when the terminating base station controller sends a DTMF tone or its own voice loop to the test terminal, the test terminal sends a signal back to the base station controller to compare the two signals and measure the quality of the traffic channel.

Through the above procedure, the base station connects the call with the test terminal through the designated sector and the frequency channel / access channel, thereby confirming whether the designated sector and the frequency channel / access channel operate normally.

3 is a flowchart showing a second embodiment of a remote call control method according to the present invention (a second method of frequency change), with reference to FIGS. 1 and 3, using a base station tester and a test terminal according to the present invention. A second embodiment of the call control method will be described in detail.

When the base station in the remote control state of the base station tester receives a remote call test request command, the base station tester allocates resources and sends a command to set up a call to the base station tester when the resource is required to be occupied.

The base station tester uses the switch 11 of FIG. 1 to connect a signal of a specific sector to be tested, for example, a sector, indicated by the base station to the test terminal 130 through the variable attenuator 1, and through the a sector. Instruct the test terminal to change the terminal subscriber number.

If the change of the subscriber number is normally completed, the base station instructs the test terminal to request an originating call. The test terminal then requests originating signal from the base station through the frequency channel / access channel corresponding to the changed subscriber number.

The base station determines the type of the originating signal to determine whether the terminal requesting the originating signal is a test terminal or a general mobile terminal. If the originating call requested from the test terminal is a remote call, assign the specified resource or any resource to meet the request of the originating call and set up the call with the called party in conjunction with the system.

If a call is released while the call is being set up or after the call is set up, the reason for the call being released is reported to the base station management device so that the operator can know the cause of the call failure.

In addition, after the call is normally set up, the base station management device collects data by sending a DTMF tone, voice packet loop command, or data collection command to the base station. That is, when the terminating base station controller sends a DTMF tone or its own voice loop to the test terminal, the test terminal sends a signal back to the base station controller to compare the two signals and measure the quality of the traffic channel.

Through the above procedure, the base station connects the call with the test terminal through the designated sector and the frequency channel / access channel, thereby confirming whether the designated sector and the frequency channel / access channel operate normally.

By using the present invention operating as described above, by selectively allocating the frequency / access channel possessed by the base station to be tested to the test terminal to remotely diagnose the service state of the resource, unnecessary time spent for testing It can save money and reduce the economic burden.

That is, by establishing a serial connection and a call between the test terminal and the base station remotely without a person going directly to the base station, it is possible to obtain the effect that can collect data to determine the air interface and wireless environment in the test terminal. .

In addition, the mobile terminal can access through the frequency channel / access channel of the sector to be tested to determine whether there is an abnormality in the access channel. Provides important information to determine the service status of the service.

In addition, by selectively allocating resources (sectors, frequency channels, and access channels) held by the system to establish a call, it is possible to diagnose the status of the corresponding resources.

By using a predetermined tone of DTMF and voice packet loops, it is possible to measure the quality of a particular traffic channel / access channel desired even if there is no human at a remote base station.

Claims (9)

A method for testing the service state of a base station specific resource using a base station tester and a test terminal included in a code division multiple access (CDMA) base station, the method comprising: receiving a remote call test request command from a tester located at a remote location; Wow; Allocating a resource when it is necessary to occupy the resource at the base station; Instructing the base station to set up a call over a particular sector for which service status is to be tested by the base station tester; A base station tester connecting a signal of a specific sector designated by the base station to the test terminal by using a high frequency switch (RSWU); Tuning a test terminal to the designated sector; A base station instructing a test terminal through the designated sector to tune to the specific frequency / access channel; Requesting, by a test terminal, an originating signal to a base station via the indicated specific frequency / access channel of the designated sector; And when the base station receives a call request by a remote call from a test terminal, allocates resources according to the request and sets up a call with the called party in association with the system, thereby testing the service state of the frequency / access channel of the designated sector. Remote call control method using a base station tester and a test terminal, characterized in that it comprises a step. 2. The method of claim 1, wherein if a call is released while the call is being set up or after the call is set up, the base station reports the cause of the call release to a base station management system. The traffic channel according to claim 1 or 2, wherein, after the call is normally set up, the base station sends a predetermined tone of DTMF or voice packet loop to the test terminal and analyzes the DTMF or voice packet loop looped back from the test terminal. Remote call control method using a base station tester and a test terminal, characterized in that for measuring the quality of the. 4. The method of claim 3, wherein after the call is normally set up, the test terminal collects data on the call service state by the command of the base station tester, sends the data to the base station management system, stores the data, and analyzes the air interface environment. A remote call control method using a base station tester and a test terminal. A method for testing the service state of a base station specific resource using a base station tester and a test terminal included in a code division multiple access (CDMA) base station, the method comprising: receiving a remote call test request command from a tester located at a remote location; Wow; Allocating a resource when it is necessary to occupy the resource at the base station; Instructing the base station to set up a call over a particular sector for which service status is to be tested by the base station tester; A base station tester connecting a signal of a specific sector designated by the base station to the test terminal by using a high frequency switch (RSWU); Tuning a test terminal to the designated sector; Obtaining a subscriber number (MIN) capable of catching a frequency for which service status is to be tested; A base station instructing a test terminal to change a terminal subscriber number (MIN) to the obtained subscriber number through the designated sector; Requesting, by a test terminal, an originating signal to a base station through a frequency / access channel corresponding to the changed subscriber number of the designated sector; And when the base station is requested to make a remote call from the test terminal, allocates resources according to the request and sets up a call with the called party in association with the system, thereby testing the service state of the frequency / access channel of the designated sector. Remote call control method using a base station tester and a test terminal, characterized in that configured to include. 5. The method of claim 4, wherein if the call is released while the call is being set up or after the call is set up, the base station reports the cause of the call release to the base station management system. 7. The traffic channel according to claim 5 or 6, wherein after the call is normally set up, the base station sends a predetermined tone of DTMF or voice packet loop to the test terminal and analyzes the DTMF or voice packet loop looped back from the test terminal. Remote call control method using a base station tester and a test terminal, characterized in that for measuring the quality of the. 8. The method of claim 7, wherein after the call is normally set up, the test terminal collects data on the call service state by the command of the base station tester, sends the data to the base station management system, stores the data, and analyzes the air interface environment. A remote call control method using a base station tester and a test terminal. A method for testing the service state of a base station specific resource using a base station tester and a test terminal included in a code division multiple access (CDMA) base station, the method comprising: receiving a remote call test request command from a tester located at a remote location; Wow; Allocating a resource when it is necessary to occupy the resource at the base station; Instructing the base station to set up a call over a particular sector for which service status is to be tested by the base station tester; A base station tester connecting a signal of a specific sector designated by the base station to the test terminal by using a high frequency switch (RSWU); Tuning a test terminal to the designated sector; Requesting an originating signal from a test terminal to a base station through the designated sector; And when the base station receives a call request by a remote call from a test terminal, allocates resources according to the request and sets up a call with the called party in association with the system, thereby testing the service state of the designated sector. A remote call control method using a base station tester and a test terminal.

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